Va. Code Ann. § 16.1-69.45

The Committee on District Courts shall fix the salaries for the clerks and personnel of the district courts. Any county or city may supplement the salaries of the clerks and other personnel of the district court wholly out of local funds. However, no supplements may be paid to full-time district court judges or substitute judges. The Commonwealth shall assume the cost of any supplement being paid to a district court employee on January 1, 1980.